抄録
The selection of building site is the most important work for engineer in stage of planning. Resently many failures of building site occur at the foot of mountain and hill region.
Most of them seem to be coused by inadequate condition of the site. When we select the building site, we usually examine rather empirically several factors such as geological topographical hydrological and soil condition.
The project being comparatively small and limited, engineer is able to analize stable condition by appling of soil mechanics principle. But the area conserved having great extention and variety, we must treat many factors affecting the stability of the site as geology topography soil sight view, traffic condition etc.
We have hitherto treated these factors empirically and fragmentally. Now in this paper we propose a new method to express these factors more rationally than before.
The factors treated in this paper are limited in geological topographical and soil condition and they are replaced into a standard term suitability index which is calculated by soil mechanics principle.
The suitability index being a function of soil and rock properties (c, φ) and gradient of the slope (θ) means possible maximum width of even site plane that is formed by cutting and banking of soil or rock.
Thus the factors discussed fragmentally before are comparatively synthetic expressed. This method however is not available for exact analysis of stability of relatively small and limited site because the stability of the site is affected considerably by another local minor factors.
This method therefore is valuable as a standard to determine adequate site in primary stage of site planning.
